HOUSE, THE GENUS IPOMCEA 209 



52. Ipomoea longipedunculata (Mart. & Gal.) Hemsley, Biol. Cent,- 

 Am. Bot. 2: 389. 1882. 



Pharbitis longipedunculata Mart. & Gal. in Bull. Acad. Brux. XII. 2: 271. 1845. 



Stems reflexed hispid to nearly glabrate; leaf-blades orbicular-ovate, 6-10 cm. 

 long, acute or acuminate, entire or rarely 3-lobed, deeply cordate, densely pubescent 

 above and ciliate; peduncles usually elongated, 8-20 cm. long, hirsute, 1- to 5-flow- 

 ered; pedicels 1-4 cm. long; sepals subequal, oblong-lanceolate, the outer ones 

 usually obtuse, the inner acute, 12-15 mm. long, hirsute, the inner ones with scarious 

 margins; corolla rose-purple, 6-8 cm. long, glabrous. 



Type locality: "Crescit in Mexico, in Sylvis El Sabino prope Ixmi- 

 quilpan." 



Distribution: Thickets and forests, San Luis Potosi to Guatemala. 



Specimens examined: San Luis Potosi, Palmer 45, 1902 (N, Y, G). 

 Vera Cruz: Orizaba, Miiller 242 & 1567, 1855 (C); Seaton 256, 1891 (C, 

 G); Pringle 7053, 1895 (G). IMorelos; Purpus 1755, 1905 (Y, G). Rose 

 & Hay 5665, 1901 (N, G). Mexico; Borgeau 498, 1856 (G), 1738, 1866 

 (Y). Pri7igle 6452, 1896 (G, N, C), Urbina, 1881 (M); Altamirano, 1888 

 (M). Oaxaca; E. W. Nelson 1184, 1894 (N); Conzatti & Gonzalez 143 

 & 473, 1895 (G); Pringle 5665, 1894 (G), 8432, 1900 (G, Y, N). Jalisco; 

 Palmer 335, 1886 (N, C, G), Pringle 4448, 1893 (G, N, C). 



Guatemala; San Miguel Uspantam, Quiche, John Donnell Smith 

 (legit Heyde & Lux.) 3189, 1892 (G). 



^53. Ipomoea orizabensis (Pelletan) Ledenois; Steud. Nom. ed. 2, 818. 

 1841. 



Ipomoea hatatoides Benth. PI. Hartw. 46. 1840. Not /. batatoides Choisy, 1837. 

 Convolvulus orizabensis Pelletan, in Jour, de Chemie Medicale, de Pharmacie et de 



Toxicologie 10: 1. 18.34. 

 Ipomoea mestitlanica Choisy in DC. Prodr. 9: 389. 1845. 



Root tuberous; stems glabrous or finely pubescent; leaf-blades ovate, shallowly 

 cordate, 3-lobed or entire, 7-10 cm. long, acuminate, lateral lobes not spreading; 

 peduncles 1- to 5-flowered; sepals lanceolate, thin, smooth, subequal, acuminate, 

 10-15 mm. long; corolla 7-8 cm. long, the purplish-blue limb shading into white 

 below. 



Type locality: Near Orizaba, Mexico. 



Distribution: Dry or stony places, northern Mexico to Oaxaca. 



Illustrations: Bot. Reg. p/. 36. 



Specimens examined: Nuevo Leon; near Monterey, Pringle 8737, 

 1903 (G, N, Y). Oaxaca; Cerro de San Felipe, Conzatti & Gonzalez 447, 

 1897 (G). Valley of Oaxaca, E. W. Nelson 1159, 1894 (N, G). 



